Delayed and recurring blisters in the donor graft site of a burn patient.

A 79-year-old woman presented for evaluation of non-healing skin graft donor sites. The patient underwent split thickness skin graft repair two-and-a-half years ago as a consequence of severe burns from a fire that affected 10 to 15 percent of her body. Donor sites included her thighs and flanks. After initial healing, intermittent and paroxysmal, eroded and crusted, erythematous plaques have continued to arise at various donor sites. Normal skin has remained uninvolved. Histopathologic analysis showed a poor basement membrane zone. The patient's findings represented delayed and recurring blistering in the donor graft site that is uncommonly observed in burn patients.